Combined breast-drill and valve-grinder.



A. B. BROWNB.

COMBINED BREAST DRILL AND VALVE GRINDER.

APPLICATION FILED OGTZO, 1911. I

1,017,242. Patented Feb. 13,1912.

ARTHUR BENJAMIN IBROWNE, F BRANFORD, CONNECTICUT.

COMBINED BREAST-DRILL AND VALVE-GRINDER.

Specification of Letters Patent.

PateneedFeb-1a1912.

Application led October 20,1911.` Serial No. 655,667.

' To all 'wh-0m t may concern.'

Be it known that I, ARTHUR BENJAMIN BRoWNE, a citizen of the United States, residing at Branford, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Combined Breast-Drills and Valve-Grinders; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in-

Figure 1 a side view ofa combined breast drill and valve grinder constructed in accordance with my invention. Fig. 2 a simi lar view at right angles to Fig. 1. Fig. 3 a

sectional view of avportion of the implement` on an enlarged scale and showing the parts in position for producing an oscillating movement to the chuck. Fig. 4 a similar View showing the parts separated to permit the adjustment of the shaft. Fig. 5 a similar view with the parts in position to drive the chuck continuously in one direction'. Fig. 6 a plan view of theI smallerdisk detached. Fig. 7 a facepview of the driving disk detached.

This4 invention relates to a combinedl breast drill and valve grinder.

In the use ofl a breast drill thechuck must be driven in one direction, but in valve grinding it is desirable thatl the chuck shallbe oscillated; that is, turned first in one direction and then the other.l It is also de'- sirable that the chuck shall be given a complete revolution. g Y

The object ofv this invention is to provide ina single frame 'a breast drill and al device for grinding valves; and the invention consists in the construction hereinafter described and particularly recited in the claims.

'In carrying outmy invention, I employ a frame 2 including a breast plate 3 'of substantially usual form. In' the outer end of the frame a chuck 4 of any, desired form is secured to the outer end of a shaftf which is seated in the frame and held in place by a collar 6 which is secured by a pin 7 to the .shaft 5 at a point just above the outer end 8 of the frame.

gears 10 and 11.' The upper gear is smaller than the lower gear, and the sleeve 9 is On this shaft abovethe col-j lar 6 is a sleevef9 formed with two bevel adapted to be clamped tothe shaft 5-by a set screw 12. Extending through the frame is a driving shaft 13, and keyed ontothis shaft' on one side of the frame is a rack disk 14 having two or more rack sections 15 and 16 adapted to mesh with the gear 11. This disk may be held in place by a nut 17 formed at the inner end of a spindle 18 onwhich a handle 19 is loosely mounted. On the opposite end of the driving shaft 13 is a drlve gear disk 20. This disk is also keyed to the shaft 13 land is held in place by a nut 21 which nutalso serves in part to hold the arm 22 of a driving handle 23. This arm 22 is slotted to permit adjustment and passage of the holding screw 24. On the inner yface of this drive disk are segmental racks 25 and 26 corresponding in line with the racks 15 and 16 but arranged so as to stand between the racks 15 and 16, and the length of the segmental racks 25 and 26 is greater than the length of the segmental racks 15 and 16 and then in the other, thus giving an oscillating motion to the tool carried by the y chuck, and because the sectional racks on one disk are longer than the sectional racksvon the other, 'it follows that vthe 'chuck will graduallyvmake a complete revolution; that is, the chuck does not make va half turn in one direction and half a turn in the other and consequently balance; but if it makes half a turn in one direction, it will make more than half a turn in the opposite directlon, and so gradually increasesv its motion in one direction until it has made a complete to the chuck in grinding valves. If now it is desired to use the device as a breast drill, the nuts17 and 21 will be loosened to allow revolution. This gives the desired motion the disks 14 and 20 tol be separated as shown in Fig. 4 of the drawings. The sleeve 9.will i' then be unlocked from the shaft 5 and slipped upward into position shown in Fig. 5, and so that the gear 11 clears the racks 15 and 16 and 25 and 26, and the gear 10 comes into mesh with the circular rack 27 on the locked turned it will turn the chuck continuously in one direction.

' secured to said shaft,

'said driven shaft, bot

I claim l. The combination with a frame, of a driven shaft mounted in said frame, a sleeve two bevel gears, a drive shaft, disks carried by said 'drive shaft u on opposite sides of l'lof said disks carrylng sectional racks adapted to be engaged with one of the bevel gears, and one of the disks carrying an endless rack adapted to be engaged by the other bevel gear.

2. The combination with a frame, .a chuck mounted in said frame and having. an `inwardly projecting shaft, a sleeve longitudinally movable on .said shaft, said sleeve carryiiig two bevel gears, a drive shaft, disks carried by said drive shaft, both of said disks having sectional racks adapted to be engaged by one of theI bevel gears, and one of the disks formed with an endless rack adapted to be engaged by the other gear.

a frame, a chuck 3.' The combination with mounted in the said frame and having an inwardly projecting shaft, Ia sleeve adjustand then when the drive disk' 20 is said sleeve carrying ronnie ably secured to said shaft, said sleeve carrying two bevel gears, a drive shaft, disks adjustablysecured to said ydrive shaft, both of said disks having sectional racks adapted t0 be engaged by one of the bevel gears, and one of the disks formed with an endless rack adapted to be engaged by the other gear.

4.' The combination with a frame, a chuck mounted in said frame and having an inwardlyprojecting shaft, a sleeve adjustably secured to said shaft, said sleevecarrying two bevel gears, a drive shaft, disks carried by said drive shaft, one of said disks adapted to bemoved longitudinally on the drive shaft, whereby the disks may be separated to permit the adjustment of the sleeve, both of said 'disks having sectional racks adapted to be engaged by4 one of the bevel gears, and

one of the said disks formed with an endless rack adapted to be engaged by the other ear. g In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

ARTHUR BENJAMIN BROWNE. Witnesses: y WALTER S. Woon,

CLINTON S. JULIAN. 

